I'm right on board with you, and it's probably no surprise that I'm behind a Strange movie more than anyone else on that list. (Hint: Liam Neeson, Detective!)
I think girl-superhero movies could work if we'd occasionally cast respectable females in respectable roles. Power Girl and Supergirl are up there with Lara Croft on the "even Angelina Jolie can't salvage anything worthwhile here" chart, and let's not even talk about Wonder Woman.
With them out of the way, who comes to mind? For DC, Batgirl? Little chance of a good Batgirl flick if it stars Steph or Cassie, and the sad fact is that Barbara Gordon, with Gail Simone's "I'll walk out the door if you ever let her walk again" hangup, just wouldn't make a good main character as Oracle. A Birds of Prey movie would be pretty epic, but following the relative failure of the TV series, I doubt that'll get greenlit. I don't think the audiences are ready for a Gotham City Sirens movie (villains-as-heroes are best accepted during the "deconstruction" period of a genre, and I don't think we're quite there yet), and Zatanna is just a little too off-the-wall to make a film that is both interesting and
faithful. I think they could certainly Jonah-Hex her onto the silver screen, but nobody wants to see that happen.
With Marvel, you're probably looking at an X-teamup consisting of mainly women characters if you want
good characters, but then you have all the problems any X-movie comes with. She-Hulk is a great character and a great idea, but we're back to the problem of finding a respectable actress who even vaguely resembles Jennifer Walters. Let's face it, you can't cast Megan Fox for that one. While
I'd love a space-opera musical starring Dazzler (possibly with the plot of that What-If where she's the Herald of Galactus?!), the idea probably wouldn't catch fire with the suits... or anyone else, for that matter. Ms. Marvel is Marvel's Wonder Woman - all male-directed feminism, no substance.
Honestly, if I had to pick a female superhero to star in her own movie right now, you know who I'd pick? Empowered. The source material is comedic enough that the film doesn't have to take itself incredibly seriously, she draws her powers from her suit rather than her muscles, so the actress could feasibly be the underfed 110-lb socialite they'd probably cast anyway, and let's face it, EMP is just plain likeable.
However, none of this discussion precludes the fact that the next superhero movie should be about